Roll-off tub style container

Abstract

A roll-off tub style container which is leak-proof to prevent liquids in the container from draining onto the ground or roadways. In one embodiment of the invention, the floor of the container has an upwardly and rearwardly extending inclined portion at the rearward end thereof to prevent liquid in the container from coming into contact with the tail gate of the container. In another embodiment of the invention, the rearward end of the container is elevated during transport to prevent liquid in the container from coming into contact with the tail gate. In yet another embodiment of the container, the floor of the container is inclined upwardly and rearwardly from the forward end thereof to the rearward end thereof. A liquid collection tank may be positioned beneath the floor of the container which has an inlet in fluid communication with the interior of the container and a discharge outlet provided thereon to permit liquid in the tank to be selectively drained therefrom.

The invention claimed is: 
     
       1. In combination:
 a truck including a horizontally disposed frame having a forward end and a rearward end; 
 a container, having forward and rearward ends, mounted on said truck; 
 said forward end of said container being positioned on said frame and being in continuous contact therewith; 
 said container comprising:
 (a) a horizontally disposed floor having a forward end, a rearward end, a first side and a second side; 
 (b) a front wall extending upwardly from said forward end of said floor between said first and second sides thereof; 
 (c) a first side wall extending upwardly from said floor at said first side thereof; 
 (d) said first side wall having forward and rearward ends; 
 (e) a second side wall extending upwardly from said floor at said second side thereof; 
 (f) said second side wall having forward and rearward ends; 
 (g) a selectively closable tail gate, having upper and lower ends, at said rearward ends of said first and second side walls whereby said tail gate, when closed, engages said rearward ends of said first and second side walls and said rearward end of said floor; 
 
 said container having some liquid on said floor, 
 a vertically disposed hydraulic cylinder positioned on said frame of said truck forwardly of said rearward end of said frame of said truck and forwardly of said rearward end of said container for selectively pivoting said forward end of said container with respect to said frame thereby elevating said rearward end of said container with respect to said rearward end of said frame of said truck and said forward end of said container to prevent the liquid on said floor in said container from coming into contact with said tail gate while said truck is stationary; 
 said forward end of said container remaining in continuous contact with said frame during the pivotal movement of said container with respect to said frame; 
 said rearward end of said container remaining in its elevated position during the container being moved from one location to another to prevent the liquid in said container from coming into contact with said tail gate. 
 
     
     
       2. In combination:
 a truck including a horizontally disposed frame having a forward end and a rearward end; 
 a container, having forward and rearward ends, mounted on said truck; 
 said forward end of said container being positioned so as to be in continuous contact with said frame; 
 said container comprising:
 (a) a horizontally disposed floor having a forward end, a rearward end, a first side and a second side; 
 (b) a front wall extending upwardly from said forward end of said floor between said first and second sides thereof; 
 (c) a first side wall extending upwardly from said floor at said first side thereof; 
 (d) said first side wall having forward and rearward ends; 
 (e) a second side wall extending upwardly from said floor at said second side thereof; 
 (f) said second side wall having forward and rearward ends; 
 (g) a selectively closable tail gate, having upper and lower ends, at said rearward ends of said first and second side walls whereby said tail gate, when closed, engages said rearward ends of said first and second side walls and said rearward end of said floor; 
 
 said container having some liquid on said floor; 
 a vertically disposed pneumatic spring positioned on said frame of said truck forwardly of said rearward end of said frame of said truck and forwardly of said rearward end of said container for selectively pivoting said forward end of said container with respect to said frame thereby elevating said rearward end of said container with respect to said rearward end of said frame of said truck and said forward end of said container to prevent the liquid on said floor in said container from coming into contact with said tail gate while said truck is stationary; 
 said forward end of said container remaining in continuous contact with said frame during the pivotal movement of said container with respect to said frame; 
 said rearward end of said container remaining in its elevated position during the container being moved from one location to another to prevent the liquid in said container from coming into contact with said tail gate; and 
 said forward end of said container remaining in continuous contact with said frame during the container being in its elevated position.